#coding=utf-8
# !/usr/bin/python
# -*- coding: utf-8 -*-

from PySide6.QtCore import *
from PySide6.QtGui import *
from PySide6.QtWidgets import *
import struct, os
from com import * 

max_content_len = 128
max_frame_len = max_content_len + 32 + 9

OTAMSGERR_MODE      = 0xFFFFFFFF
OTAMSGERR_VERSION   = 0xFFFFFFFE
OTAMSGERR_OTHER     = 0xFFFFFFF0

STR_OTAMSGERR_MODE = "异常终止，升级文件硬件版本不符"
STR_OTAMSGERR_VERSION = "异常终止，升级文件软件版本太低或相同"
STR_OTAMSGERR_OTHER = "异常终止，其他异常"
STR_OTAFILE_ERR = "加载文件出错"
STR_TIMER_OVER = "等待回复超时"
STR_COM_ERR = "串口未打开"

def update_countdown(message_box, remaining_time):
     """
     更新消息框的文本以显示剩余的倒计时时间
     """
     if remaining_time > 0:
         message_box.setText(f"升级文件发送成功\r\n设备升级重启中，请等待{remaining_time}秒")
         remaining_time -= 1
         QTimer.singleShot(1000, lambda: update_countdown(message_box, remaining_time))
     else:
         message_box.close()
         

def crc32_cal(data, nbytes):
    crc32_table = [\
        0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
        0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
        0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
        0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
        0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
        0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
        0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
        0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
        0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
        0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
        0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
        0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
        0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
        0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
        0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
        0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
        0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
        0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
        0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
        0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
        0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
        0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
        0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
        0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
        0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
        0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
        0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
        0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
        0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
        0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
        0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
        0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
    ]
    crc = 0xFFFFFFFF
    for i in range(nbytes): 
        crc = crc32_table[(crc ^ data[i]) & 0xFF] ^ (crc >> 8)
    return crc ^ 0xFFFFFFFF

class Kota:
    def __init__(self, ui):
        self.ui = ui
        self.com = ui.com
        self.filename = ''
        self.filename_valid = False
        self.buf = bytearray(max_frame_len)
        
        self.timer_300ms = QTimer()
        self.timer_300ms.timeout.connect(self.ota_retry300ms_loop)
        self.timer_runover_tick = 0

        self.file_idx = 0 # 发送序号
        self.pend_idx_bak = 0 # 期望接收序号
        self.sendframe_len = 0 # 发送帧长度
        self.ack_err = 0
        self.send_is_start = 0
        
        ''' 浏览 '''
        self.UIB_browse = ui.pushButton_49
        self.UIB_browse.clicked.connect(self.load_file_browse)
        ''' 软件信息 '''
        self.ui.textEdit_3.setTextColor(QColor(100,100,100))
        ''' 升级文件文件加载 '''
        self.UICBox_file = ui.comboBox_5
        self.UICBox_file.activated.connect(self.load_file_combox)
        self.setup_last_file()
        ''' 开始升级 '''
        ui.pushButton_51.clicked.connect(self.ota_retry300ms_start)
        ''' 升级复位 '''
        ui.pushButton_50.clicked.connect(self.ota_retry300ms_reinit)
        ''' 进度条 '''
        self.Bar = ui.progressBar_3
        ''' 提示图片 '''
        self.pic1 = ui.label_343
        self.pic2 = ui.label_345
        self.pic3 = ui.label_347
        self.pic1.setEnabled(False)
        self.pic2.setEnabled(False)
        self.pic3.setEnabled(False)


    def load_file_browse(self):
        print("file_browse")
        path = os.path.abspath('.')
        file_dialog = QFileDialog(None, caption='加载文件', directory = path, filter="BIN files(*.bin);;All files(*)")
        if file_dialog.exec():
            self.filename = file_dialog.selectedFiles()[0]
            self.filename_valid = self.load_file()
            if self.filename_valid:
                self.ui_stpe_tips(1)
                self.save_last_file()
            else:
                self.ui_stpe_tips(0)
        
    def load_file_combox(self):
        self.filename = self.UICBox_file.currentText()
        self.load_file()
        
    def load_file(self):
        filename = self.filename
        print(filename)
        file_size = os.path.getsize(filename)
        print("file_size ", file_size)
        if file_size < 1024 or file_size > 1024*512:
            self.ui.textEdit_3.setPlainText("文件大小不正确")
            return False    
        with open(filename, 'rb') as f:
            binhead = f.read(32)     
            self.model, self.version, Date, crc32val, head_len, data_len,\
                Time, reserved2 = struct.unpack('<IIIIIIII', binhead[0:32])  
            self.msg_binhead = struct.pack('<IIIII', self.model, self.version, Date, crc32val, data_len + head_len)
            # print(' '.join(f'{c:02x}' for c in self.msg_binhead))
            if file_size >= data_len + head_len:
                self.file_size = data_len + head_len
                content = "软件类型: {:0>4x}\n".format(self.model)
                v1 = (self.version&0xff00) >> 16
                v2 = self.version&0xff
                content += "软件版本: {:d}.{:d}.{:d}.{:d}\n".format(int(v1/10), int(v1%10), int(v2/10), int(v2%10))
                content += "文件长度: {:.1f}KB\n".format(self.file_size/1000)
                content += "校验信息: {:0>4X}\n".format(crc32val)
                content += "编译日期: {:02d}-{:02d}-{:02d} {:02d}:{:02d}:{:02d}".format(int(Date/10000), int(Date%10000/100), int(Date%100) \
                    , int(Time/10000), int(Time%10000/100), int(Time%100) )
                self.ui.textEdit_3.setPlainText(content)
                self.ota_pack_frame_reinit()
                return True
            else:
                self.ui.textEdit_3.setPlainText("文件长度不符")
                return False
        self.ui.textEdit_3.setPlainText("文件打开失败")        
        return False  
                
    def setup_last_file(self):
        filename = self.ui.cfg.data['otafile']
        if len(filename) <= 4:
            return
        suffix = filename[-4:].lower()
        print(suffix)
        if(suffix == '.bin'):
            self.UICBox_file.addItem(filename)
            self.UICBox_file.setCurrentText(filename)
            self.filename = filename
            
 
    # 历史文件保存
    def save_last_file(self):
        comboBox = self.UICBox_file
        count = comboBox.count()
        if self.filename not in [comboBox.itemText(i) for i in range(count)] \
            or count == 0:
            comboBox.addItem(self.filename)
        # 保存上次的文件到配置文件
        self.ui.cfg.data['otafile'] = self.filename
        self.ui.cfg.save()
        comboBox.setCurrentText(self.filename)

    def com_driver_load(self):
        # 特殊处理1
        self.ui.com.timer_disable = True
        
    def com_driver_unload(self):
        # 特殊处理2
        self.ui.com.timer_disable = False

    def save(self):
          filename = self.filename
          try:
              with open(filename, 'w+') as f:
                  json.dump(self.data, f,indent=4)
                  print("write ok");
          except IOError as err:
              print("write err");
              

    def ota_pack_frame_reinit(self): 
        filename = self.filename
        self.buf[0] = 0xAA # # 0 帧头1 */
        self.buf[1] = 0x55 # # 1 帧头2 */
        self.buf[2] = 0xA9 # # 2 帧长度 */
        self.buf[5] = 0X10
        self.buf[6] = 0x59 # type
        self.buf[7:27] = self.msg_binhead
        with open(filename, 'rb') as f:
            self.bincontent = f.read() 
        self.file_idx = 0 # 发送序号
        self.pend_idx_bak = 0 # 期望接收序号
        self.sendframe_len = 0 # 发送帧长度
        # self.ota_pack_frame()


    def ota_pack_frame(self): 
        content_len = self.file_size - self.file_idx
        if content_len > max_content_len:
            content_len = max_content_len
        frame_len = 32 + content_len + 9 
        self.buf[2] = frame_len
        self.buf[39 : 39 + content_len] = self.bincontent[self.file_idx : self.file_idx + content_len]
        crc = crc32_cal(self.buf[39 : 39 + content_len], content_len)
        self.buf[19:23] = struct.pack('<I', crc)
        self.buf[27:31] = struct.pack('<I', content_len)
        self.buf[31:35] = struct.pack('<I', self.file_idx)
        self.buf[frame_len-2] = 0
        self.buf[frame_len-1] = 0
        array = self.buf[0:frame_len]
        SUM = GetCheckWord(array, frame_len)
        
        # print(' '.join(f'{c:02X}' for c in array))
        # print("sum {:x} len {:d}".format(SUM, frame_len));
        
        self.buf[frame_len-2] = SUM & 0xff
        self.buf[frame_len-1] = SUM >> 8
        self.pend_idx_bak = self.file_idx + content_len # 期望接收序号更新
        self.sendframe_len = content_len + 32 + 9
        return frame_len
        
    def ota_msg_send(self):
        send_len = self.ota_pack_frame()
        array = self.buf[0:send_len]
        if self.com.serdev.ser.isOpen() and self.send_is_start == 1:
            self.com.serdev.ser.write(array)
            # print(' '.join(f'{c:02X}' for c in array))
        
    def decode(self, a):
        file_idx_bak = struct.unpack('<I', a[7:11])[0] # 7升级文件序号
        print("ota decode rec: {:d}/{:d}".format(file_idx_bak, self.pend_idx_bak))

        if file_idx_bak >= OTAMSGERR_OTHER:
            ''' 终端响应：接收异常 '''
            self.ack_err = file_idx_bak
            self.file_idx = 0
        elif file_idx_bak >= self.file_size:
            ''' 终端响应：接收完成 '''
            self.ack_err = 0
            self.file_idx = self.file_size
        elif file_idx_bak == self.pend_idx_bak:
            ''' 终端响应：已接收上次的数据，清除超时 '''
            self.ack_err = 0
            self.file_idx = file_idx_bak
            self.ota_msg_send()
            self.ota_retry300ms_defer()
            self.timer_runover_tick = 0
        elif file_idx_bak == 0:   
            ''' 终端是第一帧，不清除超时 '''
            self.ack_err = 0
            self.file_idx = 0
      
    def ota_retry300ms_loop(self):
        time_out_t = 100 # 12s
        if self.ack_err == OTAMSGERR_MODE:
            self.showMessageBox(STR_OTAMSGERR_MODE)
        elif self.ack_err == OTAMSGERR_VERSION:
            self.showMessageBox(STR_OTAMSGERR_VERSION)    
        elif self.ack_err >= OTAMSGERR_OTHER:
            self.showMessageBox(STR_OTAMSGERR_OTHER)
        prigerss = int(100 * self.file_idx/self.file_size)
        self.Bar.setValue(prigerss) 
        
        if False == self.com.serdev.ser.isOpen():
            self.showMessageBox(STR_COM_ERR) # 错误，串口未打开
            self.ota_retry300ms_stop()
            return
            
        if  self.ack_err >= OTAMSGERR_OTHER:
            self.ota_retry300ms_stop() # 错误，上面函数执行弹窗，这里执行退出
            return
            
        if self.file_idx == self.file_size and self.file_idx > 1024:
            self.ui_stpe_tips(3) # 升级成功，退出
            self.showMessageBox_OK()
            self.ota_retry300ms_stop()
            return
            
        if self.defer_flag == 1:
            self.defer_flag = 0 # 在接收线程中有发送，但是未触发重发
        elif self.timer_runover_tick >= time_out_t:
            ''' 超时停止处理 ''' 
            self.showMessageBox(STR_TIMER_OVER)
            self.ota_retry300ms_stop() 
        else:
            ''' 执行重发 ''' 
            self.ota_msg_send()
            self.timer_runover_tick = self.timer_runover_tick + 1
                
    
    def ota_retry300ms_start(self):
        self.file_idx = 0
        self.timer_runover_tick = 0
        self.defer_flag = 0
        load_file_res = self.load_file() 
        self.Bar.setValue(0) 

        if False == self.com.serdev.ser.isOpen():
            self.ui_stpe_tips(0)
            self.showMessageBox(STR_COM_ERR)
        elif False == load_file_res :
            self.ui_stpe_tips(0)
            self.showMessageBox(STR_OTAFILE_ERR)
        else:
            self.ui_stpe_tips(2)
            self.timer_300ms.start(300)
            self.com_driver_load()
            self.send_is_start = 1
        
    def ota_retry300ms_stop(self):
        self.timer_300ms.stop()
        self.com_driver_unload()
        self.send_is_start = 0
        
    def ota_retry300ms_reinit(self):
        if self.filename_valid:
            self.ui_stpe_tips(1)
        else:
            self.ui_stpe_tips(0)
        self.Bar.setValue(0)
        self.ota_retry300ms_stop() 

    def ota_retry300ms_defer(self):
        self.defer_flag = 1

    def showMessageBox(self, str):
        self.ota_retry300ms_stop()
        msgBox = QMessageBox()
        msgBox.setWindowTitle('错误')
        msgBox.setText(str)
        msgBox.setStandardButtons(QMessageBox.Yes)
        msgBox.setIcon(QMessageBox.Warning)
        msgBox.setStyleSheet("""
            QMessageBox {
                background-color: #FFFFFF;
                color: black;
                font-size: 14px;
            }
            QLabel {
                font: 12pt "黑体";
            }
        """)

        msgBox.exec()
 

        
    def showMessageBox_OK(self):
        self.ota_retry300ms_stop()
        msgBox = QMessageBox()
        msgBox.setWindowTitle('成功')
        remaining_time = 9
        msgBox.setText(f"升级文件发送成功\r\n设备升级重启中，请等待{remaining_time}秒")
        QTimer.singleShot(1000, lambda: update_countdown(msgBox, remaining_time - 1))
        msgBox.setStandardButtons(QMessageBox.Ok)
        msgBox.setIcon(QMessageBox.Information)
        msgBox.setStyleSheet("""
            QMessageBox {
                background-color: #FFFFFF;
                color: black;
                font-size: 14px;
            }
            QLabel {
                font: 12pt "黑体";
            }
        """)

        msgBox.exec()

    def ui_stpe_tips(self, step):
        if step == 3:
            self.pic1.setEnabled(True)
            self.pic2.setEnabled(True)
            self.pic3.setEnabled(True)
        elif step == 2:
            self.pic1.setEnabled(True)
            self.pic2.setEnabled(True)
            self.pic3.setEnabled(False)
        elif step == 1:
            self.pic1.setEnabled(True)
            self.pic2.setEnabled(False)
            self.pic3.setEnabled(False)
        else:
            self.pic1.setEnabled(False)
            self.pic2.setEnabled(False)
            self.pic3.setEnabled(False)

